| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 824 DCCCXXIV |
| Ab urbe condita | 1577 |
| Armenian calendar | 273 ԹՎ ՄՀԳ |
| Assyrian calendar | 5574 |
| Bengali calendar | 231 |
| Berber calendar | 1774 |
| Buddhist calendar | 1368 |
| Burmese calendar | 186 |
| Byzantine calendar | 6332–6333 |
| Chinese calendar |
癸卯年 (Water Rabbit) 3520 or 3460 — to — 甲辰年 (Wood Dragon) 3521 or 3461 |
| Coptic calendar | 540–541 |
| Discordian calendar | 1990 |
| Ethiopian calendar | 816–817 |
| Hebrew calendar | 4584–4585 |
| Hindu calendars | |
| - Vikram Samvat | 880–881 |
| - Shaka Samvat | 745–746 |
| - Kali Yuga | 3924–3925 |
| Holocene calendar | 10824 |
| Iranian calendar | 202–203 |
| Islamic calendar | 208–209 |
| Japanese calendar |
Kōnin 15 / Tenchō 1 (天長元年) |
| Javanese calendar | 720–721 |
| Julian calendar | 824 DCCCXXIV |
| Korean calendar | 3157 |
| Minguo calendar | 1088 before ROC 民前1088年 |
| Nanakshahi calendar | −644 |
| Seleucid era | 1135/1136 AG |
| Thai solar calendar | 1366–1367 |
Year 824 (DCCCXXIV) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar.